diff options
| author | Vignesh Raghavendra <vigneshr@ti.com> | 2019-12-09 10:25:31 +0530 |
|---|---|---|
| committer | Lokesh Vutla <lokeshvutla@ti.com> | 2020-01-20 10:10:28 +0530 |
| commit | 016e6d6a4f9b2b29d9b7f65cbb44874182e277b8 (patch) | |
| tree | 7e68e6accb21b6f8549f49bfe918dd94801bdb09 /include/linux/bitops.h | |
| parent | 0a7886c84dc88011c127eebcad0c909bfce5dae8 (diff) | |
lib: Import few bitmap functions from Linux
Import few basic bitmap functions (bitmap_{weight,fill,set,clear,or}())
and their dependencies from Linux. These are required for upcoming DMA
resource allocation support for TI's K3 SoCs.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 259df43fb0..a07c70fd48 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -4,6 +4,7 @@ #include <asm/types.h> #include <asm-generic/bitsperlong.h> #include <linux/compiler.h> +#include <linux/kernel.h> #ifdef __KERNEL__ #define BIT(nr) (1UL << (nr)) @@ -133,6 +134,17 @@ static inline unsigned int generic_hweight8(unsigned int w) return (res & 0x0F) + ((res >> 4) & 0x0F); } +static inline unsigned long generic_hweight64(__u64 w) +{ + return generic_hweight32((unsigned int)(w >> 32)) + + generic_hweight32((unsigned int)w); +} + +static inline unsigned long hweight_long(unsigned long w) +{ + return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w); +} + #include <asm/bitops.h> /* linux/include/asm-generic/bitops/non-atomic.h */ |